According to North American Numbering Plan, 304378 located in MARTINSBURG, West Virginia. the first three digits 304 locate to state West Virginia, 378 locate the city MARTINSBURG, furthermore, we also provide some other information such as the zip code example(s) 25401, 25403, 25404, carrier NEW FRONTIERS TELECOMMUNICATIO, and the latitude and longitude is 39.459 -77.9697. Please pay attention that the detail we provide only as a reference, the details of the zip code may be not complete, the latitude and longitude likely to have deviation.

Here are some random corresponding phone numbers.